Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, 0, 1), (1, -1, 1), (1, 0, 0), (1, 1, -1)}.
A148159
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, 0, 1), (1, -1, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =30a(6) =101a(7) =325a(8) =1173a(9) =4129a(10) =15600a(11) =57991a(12) =227819a(13) =882158a(14) =3556595a(15) =14196649a(16) =58341251a(17) =237985861a(18) =994094162a(19) =4126639959a(20) =17456975753a(21) =73516604930a(22) =314208829825
External references
- oeis: A148159